What Command Terms Are Most Common in ESS Exams? (2026 First Assessment)

1. Define

• Give a precise meaning.
• Example: “Define the term carrying capacity.”

2. Explain

• Provide reasons or mechanisms.
• Example: “Explain how deforestation affects the carbon cycle.”

3. Compare

• Highlight both similarities and differences.
• Example: “Compare intensive and extensive farming systems.”

4. Distinguish

• Show clear differences between terms.
• Example: “Distinguish between renewable and non-renewable resources.”

5. Discuss

• Present a balanced argument with different perspectives.
• Example: “Discuss the role of international agreements in addressing climate change.”

6. Evaluate

• Assess strengths, weaknesses, and overall effectiveness.
• Example: “Evaluate the effectiveness of the Montreal Protocol.”

7. To what extent

• Judge the degree to which a statement is valid.
• Example: “To what extent is population growth the main driver of sustainability challenges?”

Strategies for Answering Command Terms

• Define/Outline/Describe: Be brief, precise, and factual. Avoid over-explaining.
• Explain: Use cause-and-effect language (“because,” “this leads to”).
• Compare/Contrast: Use a structured format with clear similarities and differences.
• Discuss/Evaluate: Always bring in case studies and balance pros/cons.
• To what extent: Take a stance, but acknowledge alternative viewpoints.

Command Terms in Exams

Paper 1

• Usually low- to mid-level terms (Define, Explain, Compare).
• Applied to data from the case study booklet.

Paper 2

• More high-level terms (Discuss, Evaluate, To what extent).
• Require extended essay-style answers with examples.

Exam Tips

1. Underline the command term in the exam. It reminds you of what is being asked.
2. Match your structure to the term. For example, “Compare” requires similarities AND differences.
3. Don’t under-answer high-level terms. “Discuss” and “Evaluate” require depth and case studies.

FAQs

1. Do I need to memorize all command terms?
Yes. Examiners expect precise understanding of each.

2. Are command terms the same at SL and HL?
Yes, but HL questions often use more evaluative terms like “Discuss” and “To what extent.”

3. Could I lose all marks if I ignore the command term?
Yes. Misinterpreting the command term can prevent you from reaching higher markbands, even with good knowledge.

Conclusion

Command terms are the key to unlocking marks in ESS exams. By mastering their definitions and tailoring your answers to the demand of each question, you’ll avoid common mistakes and maximize your score in the 2026 first assessment.

RevisionDojo Call to Action:
Want command term practice drills with model answers? RevisionDojo provides structured ESS exam prep to help you master exam technique and secure a 7.

Learn how ecological succession transforms ecosystems over time and why it’s a key IB Environmental Systems & Societies (ESS) topic.